I have only a very short and simple thought this morning from these words in Isaiah 60. Isaiah declares that the light has come. Christ, the Sun of Righteousness has come into this world and has boldly and clearly shone forth the glory of God to us. He is the Light of the World, the Bright Morning Star. He has come and if, in mercy, His light has shown upon your darkness then you have a responsibility. That responsibility is to "arise, shine; for your light has come."
Christ is as the sun, we are like the moon. We are to reflect His light in the darkness of this fallen world. O Church of the Living God, are you shining? "You are the light of the world. A city set on a hill cannot be hidden. Nor do men light a lamp, and put it under the peck-measure, but on the lampstand; and it gives light to all who are in the house. Let your light shine before men in such a way that they may see your good works, and glorify your Father who is in heaven." (Matthew 5:14-16)
Praying to shatter the darkness with His light,